JEE Main 202117 Mar, Evening shiftMathematicsMediumThree Dimensional Geometry249× since 2002
Let P be an arbitrary point having sum of the squares of the distances from the planes x + y + z = 0, lx nz = 0 and x 2y + z = 0, equal to 9. If the locus of the point P is x² + y² + z² = 9, then the value of l n is equal to _________.